Re: [PATCH v1 6/9] clk: qcom: add support for SM8350 DISPCC

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

On 29/04/2022 18:12, Robert Foss wrote:
> From: Jonathan Marek <jonathan@marek.ca>
> 
> Add support to the SM8350 display clock controller by extending the SM8250
> display clock controller, which is almost identical but has some minor
> differences.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> ---
>   drivers/clk/qcom/Kconfig         |  4 +--
>   drivers/clk/qcom/dispcc-sm8250.c | 61 +++++++++++++++++++++++++++++++-
>   2 files changed, 62 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index 9b1f54e634b9..1752ca0ee405 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -609,11 +609,11 @@ config SM_DISPCC_6125
>   	  splash screen
>   
>   config SM_DISPCC_8250
> -	tristate "SM8150 and SM8250 Display Clock Controller"
> +	tristate "SM8150/SM8250/SM8350 Display Clock Controller"
>   	depends on SM_GCC_8150 || SM_GCC_8250
>   	help
>   	  Support for the display clock controller on Qualcomm Technologies, Inc
> -	  SM8150 and SM8250 devices.
> +	  SM8150/SM8250/SM8350 devices.
>   	  Say Y if you want to support display devices and functionality such as
>   	  splash screen.
>   
> diff --git a/drivers/clk/qcom/dispcc-sm8250.c b/drivers/clk/qcom/dispcc-sm8250.c
> index 22d9cbabecab..95f86ffcc3b3 100644
> --- a/drivers/clk/qcom/dispcc-sm8250.c
> +++ b/drivers/clk/qcom/dispcc-sm8250.c
> @@ -43,6 +43,10 @@ static struct pll_vco vco_table[] = {
>   	{ 249600000, 2000000000, 0 },
>   };
>   
> +static struct pll_vco lucid_5lpe_vco[] = {
> +	{ 249600000, 1750000000, 0 },
> +};
> +
>   static struct alpha_pll_config disp_cc_pll0_config = {
>   	.l = 0x47,
>   	.alpha = 0xE000,
> @@ -1228,6 +1232,7 @@ static const struct of_device_id disp_cc_sm8250_match_table[] = {
>   	{ .compatible = "qcom,sc8180x-dispcc" },
>   	{ .compatible = "qcom,sm8150-dispcc" },
>   	{ .compatible = "qcom,sm8250-dispcc" },
> +	{ .compatible = "qcom,sm8350-dispcc" },
>   	{ }
>   };
>   MODULE_DEVICE_TABLE(of, disp_cc_sm8250_match_table);
> @@ -1258,7 +1263,7 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
>   		return PTR_ERR(regmap);
>   	}
>   
> -	/* note: trion == lucid, except for the prepare() op */
> +	/* Apply differences for SM8150 and SM8350 */
>   	BUILD_BUG_ON(CLK_ALPHA_PLL_TYPE_TRION != CLK_ALPHA_PLL_TYPE_LUCID);
>   	if (of_device_is_compatible(pdev->dev.of_node, "qcom,sc8180x-dispcc") ||
>   	    of_device_is_compatible(pdev->dev.of_node, "qcom,sm8150-dispcc")) {
> @@ -1270,8 +1275,62 @@ static int disp_cc_sm8250_probe(struct platform_device *pdev)
>   		disp_cc_pll1_config.config_ctl_hi1_val = 0x00000024;
>   		disp_cc_pll1_config.user_ctl_hi1_val = 0x000000D0;
>   		disp_cc_pll1_init.ops = &clk_alpha_pll_trion_ops;
> +	} else if (of_device_is_compatible(pdev->dev.of_node, "qcom,sm8350-dispcc")) {
> +		static struct clk_rcg2 * const rcgs[] = {
> +			&disp_cc_mdss_byte0_clk_src,
> +			&disp_cc_mdss_byte1_clk_src,
> +			&disp_cc_mdss_dp_aux1_clk_src,
> +			&disp_cc_mdss_dp_aux_clk_src,
> +			&disp_cc_mdss_dp_link1_clk_src,
> +			&disp_cc_mdss_dp_link_clk_src,
> +			&disp_cc_mdss_dp_pixel1_clk_src,
> +			&disp_cc_mdss_dp_pixel2_clk_src,
> +			&disp_cc_mdss_dp_pixel_clk_src,
> +			&disp_cc_mdss_esc0_clk_src,
> +			&disp_cc_mdss_mdp_clk_src,
> +			&disp_cc_mdss_pclk0_clk_src,
> +			&disp_cc_mdss_pclk1_clk_src,
> +			&disp_cc_mdss_rot_clk_src,
> +			&disp_cc_mdss_vsync_clk_src,
> +		};
> +		static struct clk_regmap_div * const divs[] = {
> +			&disp_cc_mdss_byte0_div_clk_src,
> +			&disp_cc_mdss_byte1_div_clk_src,
> +			&disp_cc_mdss_dp_link1_div_clk_src,
> +			&disp_cc_mdss_dp_link_div_clk_src,
> +		};
> +		unsigned int i;
> +		static bool offset_applied;
> +
> +		/* only apply the offsets once (in case of deferred probe) */
> +		if (!offset_applied) {
> +			for (i = 0; i < ARRAY_SIZE(rcgs); i++)
> +				rcgs[i]->cmd_rcgr -= 4;
> +
> +			for (i = 0; i < ARRAY_SIZE(divs); i++) {
> +				divs[i]->reg -= 4;
> +				divs[i]->width = 4;
> +			}
> +
> +			disp_cc_mdss_ahb_clk.halt_reg -= 4;
> +			disp_cc_mdss_ahb_clk.clkr.enable_reg -= 4;
> +
> +			offset_applied = true;
> +		}
> +
> +		disp_cc_mdss_ahb_clk_src.cmd_rcgr = 0x22a0;
> +
> +		disp_cc_pll0_config.config_ctl_hi1_val = 0x2A9A699C;
> +		disp_cc_pll0_config.test_ctl_hi1_val = 0x01800000;
> +		disp_cc_pll0_init.ops = &clk_alpha_pll_lucid_5lpe_ops;
> +		disp_cc_pll0.vco_table = lucid_5lpe_vco;
> +		disp_cc_pll1_config.config_ctl_hi1_val = 0x2A9A699C;
> +		disp_cc_pll1_config.test_ctl_hi1_val = 0x01800000;
> +		disp_cc_pll1_init.ops = &clk_alpha_pll_lucid_5lpe_ops;
> +		disp_cc_pll1.vco_table = lucid_5lpe_vco;
>   	}
>   
> +	/* note for SM8350: downstream lucid_5lpe configure differs slightly */

Isn't this already being taken care by the previous code?

With this comment removed:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>


>   	clk_lucid_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);
>   	clk_lucid_pll_configure(&disp_cc_pll1, regmap, &disp_cc_pll1_config);
>   


-- 
With best wishes
Dmitry